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Service bulletins for the 2023 Honda CIVIC SI

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

4 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
A26-0102026-10-01. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair).
A26-0102026-08-27. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.
ATI&011620269022026-01-27. Other. STRUCTURE:BODY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2026 Civic Touring, Sport Touring & Si vehicles with a customer complaint of a rear shelf assembly vibration while playing music. Customer may also notice a rattle around the child seat anchor tether strap cover area on the rear shelf. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
ATI&010520269042026-01-27. Other. STRUCTURE:BODY. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2022-2026 Civic Touring, Sport Touring & Si vehicles with a customer complaint of a rear shelf assembly vibration while playing music. Customer may also notice a rattle around the child seat anchor tether strap cover area on the rear shelf. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.